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1 BIM & SIMULATION Linking Building Design Performance and BIM Martin Simpson Associate Director ARUP RAEng Professor of Innovation University of Salford Should BIM be: A) A process that conforms, enhances and strengthens your current business by facilitating greater efficiency and providing new opportunity? B) A software that you choose to impose on your current business because everyone else is using it and you are therefore willing to conform you business processes to the limitations of the software? MARTIN SIMPSON ARUP/The University of Salford 1

2 Why Change? Cost of Change Cost This must be avoided This is the ideal place for change to occur, ie where it is cheap! Egan stated that up to 30% of construction is rework Feasibility Concept Design Detailed Design Construction Post Construction Time To cost of post construction change is many times the cost of change during design Example Data, Information, & Knowledge Why Change? Lose of Data Concept Design Construction As Built? Current Practice Handover Date atrophy during project lifecycle due to: Information exchange via 2D drawings/sketches/reports/conversations... Upfront simulation is limited and for some disciplines simulation is not accurate We start the final production phase commence before design is complete. Often without production of prototypes (Most buildings are unique!) MARTIN SIMPSON ARUP/The University of Salford 2

3 Why Change? Duplication of work The cost of inadequate interoperability in the U.S. capital facilities industry estimated at: $15.8 billion per year Because the government tells you to? MARTIN SIMPSON ARUP/The University of Salford 3

5 Defining BIM? A coordinated digital dataset that contains appropriate computable information necessary to design, build, operate and ultimately decommission a project * Sharing Structured Information A 3D model that Contains no object attributes Has no additional information Is composed of only 2D CAD references Is not geometrically accurate Cannot be shared or requires another party to duplicate information or processes and allows you to cheat...is not BIM! MARTIN SIMPSON ARUP/The University of Salford 5

6 BIM is... Project Team members need to be able to exchange and stored project data quickly and with confidence Information Communication Technology Building Information Model (Management) Project Team members need coordinated up to date information to be able to do modelling & calculations Geometrical & BIM Technical Simulations (Virtual Prototype) Project Information Management Project Team members need carry out tasks in such a way that they are easily coordinated, recorded and verified...sharing Structured Information What are we doing really well? MARTIN SIMPSON ARUP/The University of Salford 6

28 Current Process What are the opportunities to improve? system strategies heating/ cooling loads airflows equipment sizing systems analysis finalise system time MARTIN SIMPSON ARUP/The University of Salford 28

46 Building Energy Modeling (BEM) IES VE Geometry for CD created directly in IES. - Avoids error from importing such as voids and intersections Rooms are named to match spaces in the Revit model exactly (name and number) 91 Loads calculated in IES VE 92 MARTIN SIMPSON ARUP/The University of Salford 46

52 Who is responsible for modelling spaces? MARTIN SIMPSON ARUP/The University of Salford 52

53 BIM is about sharing structured information Future Challenges Clear specifications for model build if others are to rely on the model for their own tasks This has implications on contracts & PI Validation of design & simulation Dissemination through the industry IPR of the design processes that may get embedded into the model Closing the project lifecycle and getting as-built building performance data. Real-time optimisation (power of the cloud) MARTIN SIMPSON ARUP/The University of Salford 53

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